题目内容

下列除哪个外,均属于参与生物体组成的生物大分子

A. 蛋白质
B. 核酸
C. 多糖
D. 脂肪
E. 甘油

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下列碱基中,不出现在RNA中的是

A. T
B. G
C. A
D. C
E. U

Tm值是指

A. 50%的DNA变性时的温度
B. 100%的DNA变性时的温度
C. 相变温度
D. 米氏常数
E. DNA在水中的溶解度

another since employ understand provide way care for kind of for example get helpThere are many 1 to find a job. It can be as easy as walking into a neighborhood store to look at its announcement board. Local stores often have areas where people can put small ads telling what kind of service they need or can provide. Such services include 2 children or cleaning houses. Or, job searchers can look in the newspaper. Local newspapers have 3 announcements placed by companies seeking workers. 4 popular tool for finding jobs is the Internet. For example, people in four hundred and fifty cities around the world can use the Craigslist Web site to buy objects, meet people or find a job. Craigslist says that it receives two million new job listings each month.Another useful way to find a job is through a college or university. 5 , students at the University of Texas in Austin can go to the Career Exploration Center to 6 in finding a job. Of course, looking for a job requires knowing what 7 work you want to do. For example, there is a book called "What Color is Your Parachute (降落伞)" by Richard Bolles. This book has been helping people choose a career 8 it was first published in nineteen seventy.Some experts also help people find jobs. Susan W. Miller owns a company called California Career Services in Los Angeles. She says her company helps people find jobs by first helping them 9 their strengths, goals and interests. Then she 10 them with methods and resources to help them find the right job.

生物膜的结构特点不包括

A. 膜的运动性
B. 完全由脂质双层分子构成
C. 膜的流动性与相变
D. 膜上的蛋白和脂质存在相互的作用
E. 脂质双层存在不对称性

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